/*
* Copyright 2010 Advanced Micro Devices , Inc .
*
* Permission is hereby granted , free of charge , to any person obtaining a
* copy of this software and associated documentation files ( the " Software " ) ,
* to deal in the Software without restriction , including without limitation
* the rights to use , copy , modify , merge , publish , distribute , sublicense ,
* and / or sell copies of the Software , and to permit persons to whom the
* Software is furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) BE LIABLE FOR ANY CLAIM , DAMAGES OR
* OTHER LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE ,
* ARISING FROM , OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE .
*
* Authors : Alex Deucher
*/
#include "radeon.h"
#include "radeon_asic.h"
#include "evergreen.h"
#include "evergreend.h"
/**
* evergreen_dma_fence_ring_emit - emit a fence on the DMA ring
*
* @ rdev : radeon_device pointer
* @ fence : radeon fence object
*
* Add a DMA fence packet to the ring to write
* the fence seq number and DMA trap packet to generate
* an interrupt if needed ( evergreen - SI ) .
*/
void evergreen_dma_fence_ring_emit(struct radeon_device *rdev,
struct radeon_fence *fence)
{
struct radeon_ring *ring = &rdev->ring[fence->ring];
u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
/* write the fence */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0 , 0 ));
radeon_ring_write(ring, addr & 0 xfffffffc);
radeon_ring_write(ring, (upper_32_bits(addr) & 0 xff));
radeon_ring_write(ring, fence->seq);
/* generate an interrupt */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0 , 0 ));
/* flush HDP */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0 , 0 ));
radeon_ring_write(ring, (0 xf << 16 ) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2 ));
radeon_ring_write(ring, 1 );
}
/**
* evergreen_dma_ring_ib_execute - schedule an IB on the DMA engine
*
* @ rdev : radeon_device pointer
* @ ib : IB object to schedule
*
* Schedule an IB in the DMA ring ( evergreen ) .
*/
void evergreen_dma_ring_ib_execute(struct radeon_device *rdev,
struct radeon_ib *ib)
{
struct radeon_ring *ring = &rdev->ring[ib->ring];
if (rdev->wb.enabled) {
u32 next_rptr = ring->wptr + 4 ;
while ((next_rptr & 7 ) != 5 )
next_rptr++;
next_rptr += 3 ;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0 , 1 ));
radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0 xfffffffc);
radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0 xff);
radeon_ring_write(ring, next_rptr);
}
/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
* Pad as necessary with NOPs .
*/
while ((ring->wptr & 7 ) != 5 )
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0 , 0 ));
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_INDIRECT_BUFFER, 0 , 0 ));
radeon_ring_write(ring, (ib->gpu_addr & 0 xFFFFFFE0));
radeon_ring_write(ring, (ib->length_dw << 12 ) | (upper_32_bits(ib->gpu_addr) & 0 xFF));
}
/**
* evergreen_copy_dma - copy pages using the DMA engine
*
* @ rdev : radeon_device pointer
* @ src_offset : src GPU address
* @ dst_offset : dst GPU address
* @ num_gpu_pages : number of GPU pages to xfer
* @ resv : reservation object with embedded fence
*
* Copy GPU paging using the DMA engine ( evergreen - cayman ) .
* Used by the radeon ttm implementation to move pages if
* registered as the asic copy callback .
*/
struct radeon_fence *evergreen_copy_dma(struct radeon_device *rdev,
uint64_t src_offset,
uint64_t dst_offset,
unsigned num_gpu_pages,
struct dma_resv *resv)
{
struct radeon_fence *fence;
struct radeon_sync sync;
int ring_index = rdev->asic->copy.dma_ring_index;
struct radeon_ring *ring = &rdev->ring[ring_index];
u32 size_in_dw, cur_size_in_dw;
int i, num_loops;
int r = 0 ;
radeon_sync_create(&sync);
size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4 ;
num_loops = DIV_ROUND_UP(size_in_dw, 0 xfffff);
r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11 );
if (r) {
DRM_ERROR("radeon: moving bo (%d).\n" , r);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_sync_resv(rdev, &sync, resv, false );
radeon_sync_rings(rdev, &sync, ring->idx);
for (i = 0 ; i < num_loops; i++) {
cur_size_in_dw = size_in_dw;
if (cur_size_in_dw > 0 xFFFFF)
cur_size_in_dw = 0 xFFFFF;
size_in_dw -= cur_size_in_dw;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0 , cur_size_in_dw));
radeon_ring_write(ring, dst_offset & 0 xfffffffc);
radeon_ring_write(ring, src_offset & 0 xfffffffc);
radeon_ring_write(ring, upper_32_bits(dst_offset) & 0 xff);
radeon_ring_write(ring, upper_32_bits(src_offset) & 0 xff);
src_offset += cur_size_in_dw * 4 ;
dst_offset += cur_size_in_dw * 4 ;
}
r = radeon_fence_emit(rdev, &fence, ring->idx);
if (r) {
radeon_ring_unlock_undo(rdev, ring);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_ring_unlock_commit(rdev, ring, false );
radeon_sync_free(rdev, &sync, fence);
return fence;
}
/**
* evergreen_dma_is_lockup - Check if the DMA engine is locked up
*
* @ rdev : radeon_device pointer
* @ ring : radeon_ring structure holding ring information
*
* Check if the async DMA engine is locked up .
* Returns true if the engine appears to be locked up , false if not .
*/
bool evergreen_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 reset_mask = evergreen_gpu_check_soft_reset(rdev);
if (!(reset_mask & RADEON_RESET_DMA)) {
radeon_ring_lockup_update(rdev, ring);
return false ;
}
return radeon_ring_test_lockup(rdev, ring);
}
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